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植物研究 ›› 2022, Vol. 42 ›› Issue (3): 455-465.doi: 10.7525/j.issn.1673-5102.2022.03.015

• 生理与生态 • 上一篇    下一篇

不同时期喷施NaHS对盐碱胁迫下裸燕麦H2S产生和活性氧代谢的影响

刘建新, 刘瑞瑞, 刘秀丽, 贾海燕, 卜婷, 李娜   

  1. 甘肃省陇东生物资源保护利用与生态修复重点实验室/陇东学院生命科学与技术学院,庆阳 745000
  • 收稿日期:2021-02-15 出版日期:2022-05-20 发布日期:2022-05-20
  • 作者简介:刘建新(1964—),男,教授,主要从事植物逆境生理生态研究。
  • 基金资助:
    国家自然科学基金项目(31960375);甘肃省自然科学基金项目(20JR5RA491)

Effects of Spraying NaHS at Different Growth Stages on H2S Production and Reactive Oxygen Species Metabolism of Naked Oat Leaves under Saline-Alkali Stress

Jianxin LIU, Ruirui LIU, Xiuli LIU, Haiyan JIA, Ting BU, Na LI   

  1. Gansu Key Laboratory of Protection and Utilization for Biological Resources and Ecological Restoration/College of Life Sciences and Technology,Longdong University,Qingyang 745000
  • Received:2021-02-15 Online:2022-05-20 Published:2022-05-20
  • About author:LIU Jianxin(1964—),male,professor,mainly engaged in the study of physiological and ecological of plant stress.
  • Supported by:
    the National Natural Science Foundation of China(31960375);Natural Science Foundation of Gansu Province(20JR5RA491)

摘要:

为了解气体信号硫化氢(H2S)对盐碱胁迫下裸燕麦(Avena nuda)活性氧(ROS)代谢的调节效应,筛选和确定H2S最佳的施用时期和适宜浓度。采用盆栽土培试验,研究了在裸燕麦不同时期(幼苗期、拔节期、抽穗期、开花期和灌浆期)喷施0、25、50、100、200、400 μmol·L-1 H2S供体硫氢化钠(NaHS)对3.0 g·kg-1盐碱混合 (NaCl∶Na2SO4∶NaHCO3∶Na2CO3摩尔比为12∶8∶9∶1)胁迫下裸燕麦叶片H2S含量、H2S生成关键酶L-半胱氨酸脱巯基酶(LCD)活性和ROS代谢相关物质含量和酶活性的影响。结果表明:喷施时期和NaHS浓度及其交互作用对盐碱胁迫下裸燕麦叶片中H2S、超氧阴离子()、过氧化氢(H2O2)、丙二醛(MDA)、抗坏血酸(AsA)和谷胱甘肽(GSH)含量及LCD、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)、抗坏血酸过氧化物酶(APX)和谷胱甘肽还原酶(GR)活性存在显著影响。与喷施0 μmol?L-1 NaHS相比,喷施一定浓度NaHS能够提高H2S、AsA、GSH含量和LCD、SOD、CAT、POD、APX和GR活性,减少、H2O2和MDA积累,但以上各指标最佳的喷施时期和NaHS浓度存在差异。隶属函数综合分析显示,在幼苗期和拔节期喷施25~200 μmol?L-1 NaHS的综合评价值(D)最高,表明在幼苗—拔节期喷施25~200 μmol?L-1 NaHS能更好提高ROS清除能力,从而缓解盐碱胁迫诱导ROS对裸燕麦的氧化伤害。

关键词: 硫化氢, 裸燕麦, 盐碱胁迫, 活性氧代谢

Abstract:

In order to illuminate the regulating mechanism of gas signal hydrogen sulfide(H2S) on reactive oxygen species(ROS) metabolism of naked oat(Avena nuda) under saline-alkali stress, and to screen and determine the optimal application period and concentration of H2S, the effect of spraying NaHS(H2S donor; 0, 25, 50, 100, 200 and 400 μmol·L-1) at different periods(seedling stage, jointing stage, heading stage, flowering stage and filling stage) on the H2S content, H2S production related enzyme activityof L-cysteine desulfhydrylase(LCD) and ROS metabolism-related enzyme activities and substance contents in leaves of soil-potted naked oat under 3.0 g·kg-1 salt-alkali mixed stress(NaCl∶Na2SO4∶NaHCO3∶Na2CO3 molar ratio was 12∶8∶9∶1) were carried out respectively. The results showed that spraying period, NaHS concentration and their interaction had significant effects on the content of H2S, superoxide anion(), hydrogen peroxide(H2O2), malondialdehyde(MDA), ascorbic acid(AsA) and glutathione(GSH), and the activities of LCD, superoxide dismutase(SOD), catalase(CAT), peroxidase(POD), ascorbic acid peroxidase(APX) and glutathione reductase(GR) in naked oat leaves under salt-alkali stress respectively. Compared with spraying 0 μmol?L-1 NaHS, spraying a certain concentration of NaHS increased the contents of H2S, AsA,GSH and the activities of LCD, SOD, CAT, POD, APX and GR, and reduced the accumulation of , H2O2 and MDA respectively. However, the optimal spraying period and NaHS concentration of the above indexes were different. Comprehensive analysis of membership function showed that spraying 25-200 μmol?L-1 NaHS at the seedling stage and jointing stage had the highest the comprehensive evaluation value(D). It indicated that spraying 25-200 μmol?L-1 NaHS at the seedling-joint stage improved the ROS scavenging ability, alleviated the oxidative damage of salt-alkali stress on naked oats.

Key words: hydrogen sulfide, naked oat, saline-alkali stress, reactive oxygen species metabolism

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